Changing Units in the Customary System Lesson 3-6

Brainpop Quiz Customary Units http://www.brainpop.com/math/numbersandoperations/customaryunits/ www.brainpop.com

Answers C A D B

Small - - - - - - - - Large Inch (in) ---------- Foot (ft)-------- Yard (yd) ------- Mile (mi) Ounce (oz) -------------- Pound (lb) -------------Ton (t) Fluid Ounce (fl. oz.) -- Cup (c) -- Pint (pt) -- Quart (qt) -- Gallon (gal)

Changing Units Determine the direction of the change (LargeSmall or SmallLarge) Multiply or Divide by the appropriate conversion unit. LS then multiply SL then divide

Example 48 12 gal = ______ qt L  S MULTIPLY 12 x 4 (1 gal = 4 qt)

3 Example 2 40 in = ______ ft S  L 40 ÷ 12 1 1 We can divide fractions so that remainders can be described as fractions. 10 40 x 1 1 12 3 10 3 1 = 3 3

Small to Large (ft to yd) 10 2/3 10 yd 2ft = ______ yd Small to Large (ft to yd) Divide Keeps yards the same 2 / 3

Computing With Units Combine or subtract like units. Regroup. 19 7 1 foot = 12 inches 8 feet 7 inches - 5 feet 11 inches 2 feet 8 inches

Homework Time Pg. 150 #2-28 even 10-28 write if you’re going S->L or L->S, and if multiply or divide

Bellringer 6 ½ ÷ 1 ½ = 3 2/3 X 1 ½ = 9 1/6 + 6 ¼ = 9 – 5 5/6 = MUST SHOW YOUR WORK!!!!! 6 ½ ÷ 1 ½ = 3 2/3 X 1 ½ = 9 1/6 + 6 ¼ = 9 – 5 5/6 =

Practice customary systems Practice sheet 3-6 odds go over

Homework Practice sheet 3-6 #1-26 evens (for 8-22 show work, simplified, and mixed numbers)